EP2868176B1 - Fertigungsprozessoptimierte filtereinrichtung - Google Patents

Fertigungsprozessoptimierte filtereinrichtung Download PDF

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Publication number
EP2868176B1
EP2868176B1 EP13742169.9A EP13742169A EP2868176B1 EP 2868176 B1 EP2868176 B1 EP 2868176B1 EP 13742169 A EP13742169 A EP 13742169A EP 2868176 B1 EP2868176 B1 EP 2868176B1
Authority
EP
European Patent Office
Prior art keywords
core
circuit board
filter device
section
reception section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13742169.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2868176A2 (de
Inventor
Reinhold Berberich
Jörg Dammköhler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2868176A2 publication Critical patent/EP2868176A2/de
Application granted granted Critical
Publication of EP2868176B1 publication Critical patent/EP2868176B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0066—Constructional details of transient suppressor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H1/0007—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network of radio frequency interference filters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H05K1/023—Reduction of cross-talk, noise or electromagnetic interference using auxiliary mounted passive components or auxiliary substances
    • H05K1/0233—Filters, inductors or a magnetic substance
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/08—Magnetic details
    • H05K2201/083—Magnetic materials
    • H05K2201/086—Magnetic materials for inductive purposes, e.g. printed inductor with ferrite core
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09009—Substrate related
    • H05K2201/09081—Tongue or tail integrated in planar structure, e.g. obtained by cutting from the planar structure

Definitions

  • the present invention relates to a filter device according to the preamble of claim 1 and a control device for a power steering device with a filter device according to the invention.
  • the disadvantage here is that once the design of the circuit arrangement has been selected, it can no longer be optionally equipped with such a filter, ie dispensing with the filter generally makes it necessary to change the design of the circuit arrangement. If the circuit arrangements are supplied parts, the customer, as the purchaser, cannot decide whether the circuit arrangement should be equipped with a filter or not and is bound to the original design.
  • O-shaped cores which e.g. be pushed over sheet metal cables. Nevertheless, these must be processed sequentially and require a large number of individual process steps such as soldering or welding in production. If an effective PI filter, which contains a combination of two capacitors and a coil, is to be formed with such an arrangement, the production effort is additionally increased by the application of the individual capacitors, which have to be contacted separately by welding, soldering, clamping or the like .
  • a circuit carrier for receiving a ferrite component is known.
  • the ferrite component has an opening which can be pushed over a tongue-shaped design of the circuit carrier.
  • an electromagnetic interference filter for electrical systems in automobiles which has a substrate with a receiving section on which capacitors are arranged.
  • a common mode choke is coupled to the substrate and arranged to extend around the receiving portion.
  • the common mode choke is provided in a closed, oval shape and contains an iron core.
  • the object of the invention is to provide a filter device which can be introduced into electronic control units using simple means and which avoids the aforementioned disadvantages.
  • the object is achieved by means of a filter device of the type mentioned at the outset, in which the passage of the core is formed in such a way that the receiving section and the electronic components arranged on the receiving section can be passed through the passage.
  • the invention is based on the basic idea of designing the core in such a way that it can then be applied or pushed onto the receiving section of the printed circuit board, even if electronic components are already located on the receiving section.
  • the printed circuit board can initially be completely equipped in a first step.
  • the core can then be applied to the receiving section of the printed circuit board as required.
  • a Pi filter which must necessarily have two capacitors, can be implemented particularly simply and flexibly at the same time.
  • the first and second capacitors are arranged on the printed circuit board in such a way as to enclose the core at its respective end faces.
  • the first capacitor is arranged on the receiving section and the second capacitor is arranged adjacent to the receiving section.
  • the core can only be moved on the receiving section, so that the second capacitor can be effectively protected from damage due to the core slipping.
  • the at least one of the capacitors is thus arranged in the receiving section.
  • the filter device according to the invention is therefore advantageously designed as a Pi filter and further developed in that the printed circuit board has a first and second capacitor, which are electrically connected to one another and interact with the core to filter the high-frequency currents or electromagnetic interference.
  • an embodiment of the filter device according to the invention is advantageous in which the receiving section has conductor tracks for conducting a current, the conductor tracks being arranged so as to run through the passage of the core.
  • the core can be electrically coupled to the conductor track by being applied to the receiving section or by passing the receiving section through the core.
  • the circuit board can therefore be equipped with a core without changes, but it can also be used without a core.
  • the filter device according to the invention is advantageously developed in that the printed circuit board has a main section and that the receiving section is designed as a printed circuit board part protruding from the main section.
  • the embodiment enables a particularly simple adaptation of the receiving section to the dimensions of the passage of the core without having to adapt the shape of the main section of the circuit board.
  • the filter device can also be used optionally without the arrangement of the electronic components on the main section changing.
  • An embodiment of the filter device according to the invention is particularly preferred in which a second section of the printed circuit board protruding from the main section is arranged adjacent to the receiving section.
  • the second protruding section can be used particularly advantageously to increase the mechanical stability of the printed circuit board and, furthermore, also for more stable attachment of the core to the receiving section.
  • the filter device according to the invention is advantageously further developed in that the circuit board has a fastening device for fastening the core in order to prevent the core from slipping from the desired position.
  • the fastening device has a latching element with a latching arm which has a latching projection arranged at its free end.
  • the embodiment enables the core to be fastened to the receiving section with particularly little effort.
  • an embodiment of the filter device according to the invention is advantageous in which the fastening device has a plug-in element which can be plugged into the printed circuit board and which can be brought into engagement with a section of the core.
  • the plug-in element can preferably be plugged onto the printed circuit board without any further tools. After the receiving section has been passed through the passage of the core, it is plugged onto the printed circuit board in such a way that the core is prevented from slipping out of the receiving section and preferably also from damaging the first capacitor on the receiving section. Alternatively, the core can also be secured against slipping by applying an adhesive.
  • the filter device according to the invention advantageously has a core in which the material consists of ferrite.
  • Ferrite is an inexpensive material that can be used to make a core.
  • the filter functions can be sufficiently implemented with a core made of ferrite.
  • control device for a power steering device with a housing and a filter device according to one of the preceding embodiments.
  • control device is advantageously developed in that it has a holding device that can be fastened to the housing for fastening the core in order to ensure particularly secure positioning of the core on the receiving section.
  • FIG. 1 shows a first embodiment of the filter device 1 according to the invention for filtering electromagnetic interference, in particular common mode interference.
  • the filter device has a soft magnetic core 20 with a passage 21, a printed circuit board 40 with several electronic components 41, 42 and a receiving section 43.
  • the receiving section 43 of the printed circuit board 41 can be passed through the passage 21.
  • the passage 21 is designed in such a way that the receiving section 43 and the electronic components 41 arranged on the receiving section 43 can be passed through the passage 21.
  • the circuit board 40 is designed as a printed circuit board (PCB) and has a circuit arrangement comprising a plurality of electronic components, as in FIG Figure 4 shown.
  • PCB printed circuit board
  • FIG Figure 4 shown.
  • a first and a second capacitor 41, 42 are shown by way of example.
  • the printed circuit board 40 has a main section 44 on which the electronic components for performing the main function of the printed circuit board 40 are arranged. Furthermore, the printed circuit board 40 has the receiving section 43, which is designed as a printed circuit board part protruding from the main section 44. A second section 45 of the printed circuit board 40 protruding from the main section 44 is arranged adjacent to the receiving section 43.
  • the individual sections 43, 44, 45 are designed in one piece as a printed circuit board 40.
  • the receiving section 43 has an essentially rectangular basic shape, the width of which corresponds approximately to the width of the passage 21 of the core 20. Adjacent to this, the second section 45 is also arranged with a rectangular basic shape, so that the two sections form a slot 46 in which, for example, a fastening device 50 can be arranged. As in Figure 4 shown, the shape of the respective sections 43, 45 may vary as required.
  • connection boards 49 via which the circuit board 40 can be connected to a power source, for example.
  • the receiving section 43 can also be used as a plug in order to establish an electrical connection to a power source or other devices. It is also conceivable to provide the free end of the receiving section 43 with plated-through holes suitable for press-fit connections in order to realize a particularly simple and inexpensive electrical connection, for example to a device plug, see Figure 3 .
  • the second section 45 can be provided with further contacts 48 for the transmission of signals.
  • the core 20 is made of a soft magnetic material, for example ferrite, and is designed in the shape of a ring.
  • the basic shape of the core can vary. In this exemplary embodiment, it is shown as an example rectangular with a rectangular recess, as in the sectional view from FIG Figure 1b to see. It can also be designed with rounded corners or oval.
  • the passage 21 of the core 20 is dimensioned so that the core can be pushed onto the receiving section 43, even if electronic components, in particular a capacitor 41, are already located on the receiving section 43.
  • the electronic components 41, 42 include, inter alia, a first and second capacitor 41, 42, which are arranged on the printed circuit board 40, and which are electrically connected to one another and interact with the core 20 to filter the interference.
  • the first capacitor is designed as an input and the second capacitor 42 is designed as an output-side filter capacitor and are already arranged on the circuit board 40 before the core 20 is applied to the receiving section 43.
  • a full-fledged PI filter is created by simply applying or sliding on the core 20.
  • the first capacitor 41 is advantageously arranged on the receiving section 43 and the second capacitor 42 is arranged adjacent to the receiving section 43. As in Figure 2 As shown, the core 20 rests against an edge of the printed circuit board 40 and therefore does not come into contact with the second capacitor 42. This is therefore effectively protected from damage by a slipping core 20. Furthermore, the first and second capacitors 41, 42 are arranged on the printed circuit board 40 in such a way as to enclose the core 20 at each of its end faces.
  • the filter device 1 has the advantage that an electrical function of a PI filter can be introduced without having to establish the contacting normally required for this.
  • the printed circuit board 40 can thus optionally be used with different types of cores, different materials and geometry, but also without a core, without having to change the circuit arrangement of the electronic components located on the printed circuit boards or even the printed circuit board itself.
  • the printed circuit board 20 has a fastening device for fastening the core 20.
  • the fastening device comprises a latching element 51.
  • the latching element 51 has a latching arm 52, on the free end of which a latching projection 53 is formed.
  • the length of the locking arm 52 and the position of the locking projection 43 are designed in such a way that it comes into engagement with the outer edge of the core 20 as soon as the core 20 has been completely pushed onto the receiving section 43, as shown in FIG.
  • the latching projection 53 has an essentially triangular shape, the contact surfaces of the projection 53 inclined to the direction of movement of the core 20 ensuring that the latching arm 52 is bent upwards when it comes into contact with the core 20, and the core is below the latching arm 52 can be pushed or pushed out of the locking arm 52.
  • the latching element 41 can be used to fasten the core 50 only temporarily in one position for the assembly process.
  • a plug-in element 54 which can be plugged into the printed circuit board 40 and which can be brought into engagement with a section of the core 20 can be used.
  • the plug-in element 54 is plugged into the printed circuit board 40 as soon as the core 20 is in the position pushed onto the receiving section 43, as in FIG Figure 2 shown is located. In the inserted state, the plug-in element 54 protrudes from the printed circuit board 40 so far that it blocks the movement of the core 20 out of the receiving section 43.
  • Figure 4 shows the use of the filter device 1 according to the invention in a control unit 100 for a power steering device with a housing 102, the filter device 1 being arranged within the housing 102.
  • the core 20 is by means of a holding device 103 which can be fastened to the housing 102.
  • the holding device 103 comprises two holding cushions with two protruding lips, between which the core 20 is enclosed.
  • the holding cushions are preferably formed from an elastic material and can be pressed in between the core 20 and the housing 102 or the second section 45.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Filters And Equalizers (AREA)
EP13742169.9A 2012-06-27 2013-06-27 Fertigungsprozessoptimierte filtereinrichtung Active EP2868176B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012210998 2012-06-27
PCT/EP2013/063487 WO2014001441A2 (de) 2012-06-27 2013-06-27 Fertigungsprozessoptimierte filtereinrichtung

Publications (2)

Publication Number Publication Date
EP2868176A2 EP2868176A2 (de) 2015-05-06
EP2868176B1 true EP2868176B1 (de) 2020-09-02

Family

ID=48877203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13742169.9A Active EP2868176B1 (de) 2012-06-27 2013-06-27 Fertigungsprozessoptimierte filtereinrichtung

Country Status (6)

Country Link
US (1) US9577599B2 (zh)
EP (1) EP2868176B1 (zh)
KR (1) KR20150035758A (zh)
CN (1) CN104380851B (zh)
DE (1) DE102013212422A1 (zh)
WO (1) WO2014001441A2 (zh)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1249823A (en) * 1969-07-29 1971-10-13 Pye Ltd Wide band splitter
US6160465A (en) * 1997-11-07 2000-12-12 Murata Manufacturing Co. Ltd. High-frequency choke coil
JP5248814B2 (ja) * 2007-07-18 2013-07-31 日立オートモティブシステムズ株式会社 モータ駆動装置およびその検査方法
US7999633B2 (en) * 2007-11-08 2011-08-16 Fuji Electric Systems Co., Ltd. EMI filter with an integrated structure of common-mode inductors and differential-mode capacitors realized by flexible printed circuit board
AT506930A3 (de) * 2008-04-29 2010-03-15 Siemens Ag Oesterreich Schaltungsträger zur aufnahme eines ferrit-bauelements
US8476989B2 (en) * 2009-08-18 2013-07-02 GM Global Technology Operations LLC Electromagnetic interference filter for automotive electrical systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
KR20150035758A (ko) 2015-04-07
US9577599B2 (en) 2017-02-21
CN104380851B (zh) 2017-11-10
WO2014001441A2 (de) 2014-01-03
US20150341010A1 (en) 2015-11-26
WO2014001441A3 (de) 2014-03-20
CN104380851A (zh) 2015-02-25
EP2868176A2 (de) 2015-05-06
DE102013212422A1 (de) 2014-01-02

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